Gate for turbine wheels



(N0 ModeL) ,E. O. GEYELIN. GATE FOR TURBINE WHEELS.

N0. 331,051. Patented NOV. 24, 1885 WITNESSES: INVENTOR:

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p UNITED STATEs' PATENT-Grace,"

, open to the water.

' ,EMIL o; ,GEYELIN, on PHILADELPHIA, PENNSYLVANIA.

GATE FOR 'TUR B l N E WH EELS.

; 'srnoIr-icATroN forming part of Letters Patent No. 331.051, datedNovember 24,1885.

' Application fileds eptember 26,1885. Serial No. 178,236. (No model.)

To all whom it may concern: I

Be it- 'known'that I, EMILE G. GEYELIN,

of Philadelphia, Pennsylvania, have invented a new and usefulImprovement in Gates for Turbine Wheels, whereof the following is aspecification, reference being bad to the accompanying drawing, whichrepresents a partial vertical section through the wheel and its casingwith my improvement applied thereto.

As originally constructed, the Jonval turbine was provided with a gatebeneath the movable wheel, the whole upper portion of the stationary orguide wheel being at all times Experience proved, however, that greatersensitiveness and a better duty, when the wheel was working to less thanits maximum capacity, couldbe maintained by placing the gate directlyupon the guidewheel itself, so as to modify the access of the water intothe apparatus,instead of controlling its exit therefrom. Accordingly,gates acting directly upon the guide-wheels have been heretofore used;but in every instance, so far as I am aware, the casing of theguide-wheel was externally flared outward from bottom to top, and thehood, which is necessarily used with such gates, extended over theoutwardly-flaring casing to a very considerable distance beyond theextreme periphery of the movable wheel. While, therefore, theapplication of a gate directly to a guide-wheel gave the advantagesbefore referred to, it necessitated an increase of area in the wheel pitand casings, which was disadvantageous both in economy of space and costof construction.

The object of the present invention is to provide the turbine with agate which shall combine the advantages of direct application to theguide-wheel and also the economy of space and cheapness of constructionwhich were found in the use of gates below the mov able wheel.

In the accompanying drawing, Mrepresents the wheel-pit, in which theapparatus is supported in the usual manner upon the annular ledge J.

The buckets of the movable wheel are represented by A, and those of thestationary guide-wheel by B. The guide-wheel has a cylindrical outercasing, D, and an inner casing, 0, inclined or flaring, as shown in thesectional lines upon the left-hand side of the drawing.

I is the casing of the movable wheel,which forms the draft-tube, and issubstantial'ly in line with the outer "casing, D, of the guidewheel, sothat the same diameterof pit will accommodate both parts. Above theguidewheel is suspended the hood L, which is annular in form, so as toleave an opening for admission of water on both the inner and outersides of its periphery. In cross-section the hood is somewhat V-shaped,with curved sides, however, as shown upon the left-hand side of thedrawing, so as to afford the best outline for the free entrance of thewater on both sides of the stationary or guide wheel. The extreme outerperiphery of the hood L is vertically above the outer periphery of theouter casing, D, and the inner periphery of the hood is also verticallyabove the innermost portion ofthe periphery of the inner casing, O, ofthe guide-wheel.

E is the outer gate,which is a ring of suffi-- cient vertical height toreach from the top of the hood L to a point below the top of the outercasing, D, and is preferably provided with internal flanges from top tobottom, as shown, so as to avoid unnecessary contact and friction withthe casing D. The inner gate, N, is similar in form, and adapted toextend from the top of the hood L, on the inside, to the top of theinner casing, 0. Both gates are suspended by rods K from a cross-head,G, which slides vertically upon the shaft F of the turbine, and israised and lowered by means of the rods H, which may be attached to anysuitable actuating device. In the position shown in the drawing thegates are open, and the ingress of the water is indicated by the arrows.It will be seen that inasmuch as the water is admitted to the singleguidewheel both from within and without the vertical height of theopenings may be much less than where, as has heretofore been the case,the water is admitted only upon one side, and the outward flaring of theouter casing is dispensed with, since the combined areas of the innerand outer openings are utilized in such a way that the water does notmeet with obstruction in its entrance. Thus not only the height but alsothe diameter of the hood is much reduced,-so that, vas before stated,the pit need only be'of thediameter necessary to accommodate the movablewheel. The gates are closed by raising them from the position shown inthe drawing until their tops reach the outer and inner peripheries ofthe hood L.

Having thus described my invention, Idesire to state that I do notbroadly claim in this application the use of an inner gate and an outergate, since I myself have heretofore patented a duplex wheel in whicheach member of the wheel was provided with its own hood and gate; butinsuch former use of the gates the object and advantages of the presentinvention were not attained, since the hoods were of such however, isdesigned to attainall the..-abovestated advantages by' the combinedaction of a hood and a double gate upon a single guidewheel; and

I therefore claim-- The combination, in a turbine wheel having-a 'singlestat-ionaryor guide wheel, of a substantially vertical casing around theexteriorof said guide-wheel and inclined casing I "aroundtheinterior ofsaid guide-wheel, an

annular hood whose inner and outer peripheries are respectivelyvertically above the outer and inner peripheries of said'casings, and adouble gate of sufficient'verti cal height to close the outer andinneropenings between the hood and the guide-wheel casing, said gate beingprovided with suitable raising t and lowering devices, substantiallyassetforth. 7 EMILE G. GEYELIN'.

Witnesses:

CHARLES F. Z'I'EGLER,

G. H' MARPLE;

